Web MIDI: MIDIPort doesn't have to be ActiveDOMObject

Source/modules/webmidi/MIDIAccess.cpp

Index: Source/modules/webmidi/MIDIAccess.cpp
diff --git a/Source/modules/webmidi/MIDIAccess.cpp b/Source/modules/webmidi/MIDIAccess.cpp
index 33c4c336477abf8fda5d0f374ce2ed5310433525..504bf4b0d47b1863fbf8d26e4266b2b53558bbe5 100644
--- a/Source/modules/webmidi/MIDIAccess.cpp
+++ b/Source/modules/webmidi/MIDIAccess.cpp
@@ -80,7 +80,7 @@ void MIDIAccess::didAddInputPort(const String& id, const String& manufacturer, c
 {
     ASSERT(isMainThread());
 
-    m_inputs.append(MIDIInput::create(this, executionContext(), id, manufacturer, name, version));
+    m_inputs.append(MIDIInput::create(this, id, manufacturer, name, version));
 }
 
 void MIDIAccess::didAddOutputPort(const String& id, const String& manufacturer, const String& name, const String& version)
@@ -88,7 +88,7 @@ void MIDIAccess::didAddOutputPort(const String& id, const String& manufacturer,
     ASSERT(isMainThread());
 
     unsigned portIndex = m_outputs.size();
-    m_outputs.append(MIDIOutput::create(this, portIndex, executionContext(), id, manufacturer, name, version));
+    m_outputs.append(MIDIOutput::create(this, portIndex, id, manufacturer, name, version));
 }
 
 void MIDIAccess::didStartSession(bool success)
@@ -152,8 +152,6 @@ void MIDIAccess::stop()
     MIDIController* controller = MIDIController::from(document->page());
     ASSERT(controller);
     controller->cancelSysExPermissionRequest(this);
-
-    m_accessor.clear();
 }
 
 void MIDIAccess::startRequest()